A forming tool for profiled springs

Abstract

This utility model discloses a forming fixture for irregularly shaped springs, including a spring machine with a central discharge port and multiple sliding seats. A spiral forming die and a cutter are respectively mounted on the sliding seats at the 12 o'clock and 10 o'clock positions. A bending die for holding the wire is hinged to the sliding seat at the 5 o'clock position. A pressing die is mounted on the sliding seat at the 8 o'clock position, used to press the wire after the bending die holds it, causing the wire to bend along the bending die. The fixture also includes a pushing mechanism fixedly connected to the spring machine for pushing the bending die to rotate and disengage from the bent wire. This utility model, by hinged to the bending die and using the pushing mechanism to push the bending die away from the limiting position of the protruding ring structure, enables repeated processing of the protruding ring along the spiral axis of the irregularly shaped spring.

Description

Technical Field

[0001] This utility model relates to the field of spring manufacturing, and more specifically, to a forming tool for irregularly shaped springs. Background Technology

[0002] Currently, CNC spring machines are commonly used in spring manufacturing, primarily center-discharge CNC spring machines. These machines have multiple sliding seats arranged around the center discharge hole to mount the forming mold. After the wire extends from the center discharge hole, the spring machine, according to the set forming parameters, controls the sliding seats to orderly push the forming mold radially, extruding the wire into shape. For example... Figure 4 The irregularly shaped spring shown has a spiral top with a raised ring protruding along its axis. When manufacturing this type of spring using a center-discharge spring machine, the protruding ring is trapped after being extruded by the radial movement of the forming die pushed by the sliding seat, preventing it from returning to its radial position. Therefore, a suitable forming fixture needs to be developed to allow for repeated normal forming of the protruding ring. Utility Model Content

[0003] To address the shortcomings of the existing technology, this utility model provides a forming tooling that can repeatedly process and form the convex ring along the helical axis of an irregularly shaped spring.

[0004] The above-mentioned technical objective of this utility model is achieved through the following technical solution:

[0005] A forming fixture for irregularly shaped springs includes a spring machine with a central discharge port and multiple sliding seats. A spiral forming die and a cutter are respectively mounted on the sliding seats at the 12 o'clock and 10 o'clock positions. A bending die for holding the wire is hinged to the sliding seat at the 5 o'clock position. A pressing die is mounted on the sliding seat at the 8 o'clock position for pressing the wire after the bending die holds it, causing the wire to bend along the bending die. The fixture also includes a pushing mechanism fixedly connected to the spring machine for pushing the bending die to rotate and disengage from the bent wire.

[0006] In a further improvement, the elbow mold includes an elbow, a mounting base, and an elastic element. The elbow is fixedly connected to the mounting base, the mounting base is hinged to the sliding base, and the two ends of the elastic element abut against the mounting base and the sliding base respectively, so that the elbow is kept away from the spring machine.

[0007] In a further improvement, the elbow is an L-shaped structure consisting of a long rod and a short rod, wherein the long rod is fixedly connected to the mounting base, the axis of the short rod is parallel to the axis of the discharge port, and the end of the short rod is away from the spring machine.

[0008] In a further improvement, the pushing mechanism includes a clamping bracket and a cylinder. One end of the clamping bracket is fixedly connected to the spring machine, and the other end of the clamping bracket clamps and fixes the cylinder so that the pushing end of the cylinder faces the bending mold.

[0009] A further improvement is that the sliding seat located at the seven o'clock position is equipped with a limiting die for limiting the maximum extrusion position of the extrusion die when the extrusion die is extruding wire.

[0010] A further improvement is that the sliding seat located at the three o'clock position is equipped with a bending die for bending the wire towards the nine o'clock position.

[0011] In a further improvement, the sliding seat located at the twelve o'clock position can reciprocate in a ∩-shaped motion. The spiral forming mold includes a first spiral forming head and a second spiral forming head, which are used to form cylindrical spirals and planar spirals, respectively.

[0012] In summary, the beneficial effects of this utility model are as follows: After the spiral forming die of this utility model spirals the wire to a certain length, the bending die holds the wire, while the extrusion die extrudes the wire, causing the wire to bend and form a convex ring structure along the bending die. At this time, the pushing mechanism works, pushing the bending die to rotate towards the spring machine, causing the bending die to disengage from the limiting position of the convex ring structure, so that the bending die can be normally reset for the next forming operation. This utility model, by hinged to the bending die and using the pushing mechanism to push the bending die to disengage from the limiting position of the convex ring structure, realizes the repeated processing of the convex ring along the spiral axis of irregularly shaped springs. Attached Figure Description

[0013] Figure 1 This is a three-dimensional structural schematic diagram of the present invention;

[0014] Figure 2 yes Figure 1 An enlarged view of point A;

[0015] Figure 3 This is a structural schematic diagram of the elbow mold and the pushing mechanism of this utility model;

[0016] Figure 4 This is a three-dimensional structural diagram of the irregularly shaped spring of this utility model.

[0017] The labels in the attached diagram are as follows:

[0018] Spring machine 1; center discharge port 11; sliding seat 12; spiral forming mold 2; first spiral forming head 21; second spiral forming head 22; cutter 3; bend mold 4; bend 41; mounting seat 42; elastic element 43; extrusion mold 5; limiting mold 6; extrusion bending mold 7; pushing mechanism 8; clamping bracket 81; cylinder 82; irregular spring 10; planar spiral 101; cylindrical spiral 102; convex ring 103; bending 104. Detailed Implementation

[0019] To make the technical problems, technical solutions, and beneficial effects of this utility model clearer, the present utility model will be further described in detail below with reference to the accompanying drawings and embodiments. It should be understood that the specific embodiments described herein are merely illustrative of the present utility model and are not intended to limit the present utility model.

[0020] It should be noted that when a component is referred to as being "fixed to" or "set on" another component, it can be directly or indirectly attached to that other component. When a component is referred to as being "connected to" another component, it can be directly or indirectly connected to that other component.

[0021] It should be understood that the terms "length", "width", "up", "down", "front", "back", "left", "right", "vertical", "horizontal", "top", "bottom", "inner", and "outer" indicate the orientation or positional relationship based on the orientation or positional relationship shown in the accompanying drawings. They are only for the convenience of describing this utility model and simplifying the description, and do not indicate or imply that the device or element referred to must have a specific orientation, or be constructed and operated in a specific orientation. Therefore, they should not be construed as limitations on this utility model.

[0022] Furthermore, the terms "first" and "second" are used for descriptive purposes only and should not be construed as indicating or implying relative importance or implicitly specifying the number of technical features indicated. Thus, a feature defined as "first" or "second" may explicitly or implicitly include one or more of that feature. In the description of this utility model, "a plurality of" means two or more, unless otherwise explicitly specified.

[0023] like Figure 4 The irregularly shaped spring 10 shown has a main structure from bottom to top including a planar helix 101, a cylindrical helix 102, a convex ring 103 at the top of the helix, and a bend 104 at the end of the helix. The directions of the convex ring 103 and the bend 104 are both aligned with the axis of the helix. For the convex ring 103 at the top, existing CNC spring machines with center-discharge require suitable forming fixtures to process this structure.

[0024] To address this, the present invention provides a forming tooling for irregularly shaped springs 10, referring to... Figures 1 to 3 It includes a spring machine 1 with a central discharge port 11 and multiple sliding seats 12, wherein the sliding seats 12 located at the twelve o'clock and ten o'clock positions are respectively provided with a spiral forming mold 2 and a cutter 3, which are used for spiral forming and cutting of wire, respectively.

[0025] A bend mold 4 for holding the wire is hinged to the sliding seat 12 at the five o'clock position. A pressing mold 5 is provided on the sliding seat 12 at the eight o'clock position. After the bend mold 4 holds the wire, the wire is pressed to bend and bend along the top bend mold.

[0026] Additionally, it includes a pushing mechanism 8 fixedly connected to the spring machine 1. This pushing mechanism 8 is used to push the bend mold 4 to rotate towards the spring machine 1 and disengage from the limit of the bent wire. After disengaging, the bend mold 4 resets, ready for the next forming operation.

[0027] In one embodiment, such as Figure 3 As shown, the elbow mold 4 includes an elbow 41, a mounting base 42, and an elastic element 43. The elbow 41 is fixedly connected to the mounting base 42, and the mounting base 42 is hinged to the sliding base 12. The two ends of the elastic element 43 abut against the mounting base 42 and the sliding base 12 respectively, keeping the elbow 41 away from the spring machine 1. When the pushing mechanism 8 pushes the mounting base 42, the elbow 41 rotates towards the spring machine 1, thereby disengaging from the bent wire. After the pushing action is removed, the mounting base 42 and the elbow 41 return to their original positions under the action of the elastic element 43. Preferably, the elastic element 43 is a cylindrical spring or a torsion spring.

[0028] In one embodiment, such as Figure 2 and Figure 3 As shown, the elbow 41 has an L-shaped structure consisting of a long rod and a short rod. The long rod is fixedly connected to the mounting base 42, and the axis of the short rod is parallel to the axis of the discharge port, with the end of the short rod away from the spring machine 1. The body of the short rod is used to hold the wire in place. After the wire is bent and formed, the short rod is disengaged from the bent wire under the pushing action of the pushing mechanism 8.

[0029] To ensure the quality of wire bending and forming, such as Figure 1 and Figure 2 As described above, a limiting mold 6 is provided on the sliding seat 12 located at the seven o'clock position to limit the maximum extrusion position of the extrusion mold 5 when it extrudes the wire. The limiting mold 6 is a baffle structure. In actual operation, after the short rod of the elbow 41 abuts against the wire, the limiting mold 6 extends close to the short rod of the elbow 41. At this time, the extrusion mold 5 extrudes towards the limiting mold 6, causing the wire to bend and eventually abut against the limiting mold 6, i.e., against the baffle, thereby achieving the required bending angle. By adding the limiting mold 6, it is ensured that the extrusion mold 5 reaches the required maximum extrusion position each time, improving the quality of wire forming.

[0030] In one embodiment, reference is made to Figure 1 and Figure 2 A bending die 7 is provided on the sliding seat 12 at the three o'clock position for bending the wire towards the nine o'clock position. After the wire extends from the central outlet 11, the bending die 7 squeezes the wire, causing it to bend 104 towards the nine o'clock position, forming the bend 104 at the top end of the irregular spring 10. In addition, the sliding seat 12 at the twelve o'clock position can reciprocate in a ∩-shaped movement. The ∩-shaped movement structure is not shown in the figure, which is prior art. The spiral forming die 2 includes a first spiral forming head 21 and a second spiral forming head 22, which are used for forming cylindrical spirals 102 and planar spirals 101, respectively.

[0031] In one embodiment, reference is made to Figure 3 The pushing mechanism 8 includes a clamping bracket 81 and a cylinder 82. One end of the clamping bracket 81 is fixedly connected to the spring machine 1, and the other end of the clamping bracket 81 clamps and fixes the cylinder 82, so that the pushing end of the cylinder 82 faces the elbow mold 4. Specifically, the clamping bracket 81 is adjustable, allowing adjustment of the distance and angle between the cylinder 82 and the elbow mold 4. The clamping bracket 81 is detachably fixed to the spring machine 1 by screws.

[0032] The above embodiments are merely explanations of the present utility model and are not intended to limit the present utility model. After reading this specification, those skilled in the art can make modifications to the embodiments without contributing any inventive step, but such modifications are protected by patent law as long as they fall within the scope of the claims of the present utility model.

Claims

1. A forming fixture for irregularly shaped springs, comprising a spring machine having a central discharge port and multiple sliding seats, wherein a spiral forming mold and a cutter are respectively provided on the sliding seats located at the twelve o'clock and ten o'clock positions, characterized in that: A bending die for holding the wire is hinged on a sliding seat at the five o'clock position, and a pressing die is provided on a sliding seat at the eight o'clock position for pressing the wire after the bending die holds the wire, so that the wire bends and forms along the bending die. It also includes a pushing mechanism fixedly connected to a spring machine for pushing the bending die to rotate toward the spring machine and disengage from the bent wire.

2. The forming fixture for irregularly shaped springs according to claim 1, characterized in that: The elbow mold includes an elbow, a mounting base, and an elastic element. The elbow is fixedly connected to the mounting base, the mounting base is hinged to the sliding base, and the two ends of the elastic element abut against the mounting base and the sliding base respectively, so that the elbow is kept away from the spring machine.

3. The forming fixture for irregularly shaped springs according to claim 2, characterized in that: The elbow is an L-shaped structure consisting of a long rod and a short rod. The long rod is fixedly connected to the mounting base, the axis of the short rod is parallel to the axis of the discharge port, and the end of the short rod is away from the spring machine.

4. A forming fixture for irregularly shaped springs according to claim 1, characterized in that: The pushing mechanism includes a clamping bracket and a cylinder. One end of the clamping bracket is fixedly connected to the spring machine, and the other end of the clamping bracket clamps and fixes the cylinder so that the pushing end of the cylinder faces the bending mold.

5. A forming fixture for irregularly shaped springs according to claim 1, characterized in that: The sliding seat located at the seven o'clock position is equipped with a limiting die for limiting the maximum extrusion position of the extrusion die when the extrusion die is extruding wire.

6. A forming fixture for irregularly shaped springs according to claim 1, characterized in that: The sliding seat located at the three o'clock position is equipped with a bending die for bending the wire towards the nine o'clock position.

7. A forming tooling for irregularly shaped springs according to any one of claims 1 to 6, characterized in that: The sliding seat located at the twelve o'clock position can reciprocate in a ∩-shaped motion. The spiral forming mold includes a first spiral forming head and a second spiral forming head, which are used to form cylindrical spirals and planar spirals, respectively.

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